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Proposal to Prepare an EIR and Provide Planning Consulting Services for the First and Fourth Street Corridors Mixed -Use Overlov Zone The EIR will provide an introductory discussion of the air pollutants of concern in the region, summarize local and regional air quality, describe pertinent characteristics of the air basin, and provide an overview of the physical conditions affecting pollutant buildup and dispersion in the City. The setting will also discuss the sources, types, and health effects of air pollutants. The air quality section of the EIR will also describe any intersections and roadways that might be affected by increased traffic due to implementation of the proposed project. The project's construction and operational emissions and odor impacts will be assessed, including local ambient CO impacts. This analysis will include the following components: ■ Construction Emissions. The construction emissions analysis will be based on the project description, information submitted by the traffic consultant, and the modeling techniques and significance criteria recommended by the SCAQMD. The analysis will considerthe limitations of the City's Building and Safety requirements and provide any necessary recommendations for minimizing emissions of dust or other pollutants (i.e., asbestos) from construction activities; ■ Operational Emissions. Estimates of mobile source emissions associated with operation of the project will be prepared using appropriate land use information, traffic study information, and SCAQMD significance criteria. Based on estimated project -generated vehicle trips described in the traffic study prepared for the EIR, vehicular emissions of carbon monoxide, ozone precursors (reactive organic gases and oxides of nitrogen), and small particulate matter (PM10) will be predicted and quantified using EMFAC emission factors and the California Air Resources Boards URBEMIS 2002 software, which will then be compared to the SCAQMD significance thresholds. The criteria pollutant emissions from future stationary sources will also be estimated in the same manner, ■ Local Ambient CO Impacts. The potential of project -related motor vehicle trips to cause localized carbon monoxide "hot spots"will be evaluated. For intersections in the immediate projectvicinity that are subject to the most severe project -induced traffic congestion, localized concentrations of carbon monoxide (CO) will be quantified at those locations. Local CO concentrations will be modeled at up to four intersections to be selected in coordination with City staff and the City's transportation consultant using the CALINE-4 program. The analysis will be based on guidance published by the Institute of Transportation Studies and available peak hour traffic and intersection geometry data; and ■ Odor Impacts. An analysis of whether the project would create objectionable odors affecting a substantial number of people will be included in the EIR. Potential conflicts with or potential to obstruct implementation of the applicable air quality plan where it may cause or contribute to emission of identified air pollutants in excess of levels stated in the plan or where it may fail to implement a remedial or mitigation measure required under the plan will be analyzed. Cumulative net increase of criteria pollutants for which the project region is in non -attainment will be analyzed to determine if the project emissions, considered cumulatively, will increase the level of any criteria pollutant above the existing ambient level. Biological Resources. It is assumed that the project has been largely, if not fully, disturbed as the result of previous development activities and consists primarily of hardscape. Little, if any, native vegetation exists, and it is assumed that no sensitive species or habitats would be located on-site. However, there are street trees throughout the area, and, to the extent that these trees are removed as part of the proposed 0